1# SPDX-License-Identifier: GPL-2.0-only 2menu "IRQ subsystem" 3# Options selectable by the architecture code 4 5# Make sparse irq Kconfig switch below available 6config MAY_HAVE_SPARSE_IRQ 7 bool 8 9# Legacy support, required for itanic 10config GENERIC_IRQ_LEGACY 11 bool 12 13# Enable the generic irq autoprobe mechanism 14config GENERIC_IRQ_PROBE 15 bool 16 17# Use the generic /proc/interrupts implementation 18config GENERIC_IRQ_SHOW 19 bool 20 21# Print level/edge extra information 22config GENERIC_IRQ_SHOW_LEVEL 23 bool 24 25# Supports effective affinity mask 26config GENERIC_IRQ_EFFECTIVE_AFF_MASK 27 bool 28 29# Facility to allocate a hardware interrupt. This is legacy support 30# and should not be used in new code. Use irq domains instead. 31config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ 32 bool 33 34# Support for delayed migration from interrupt context 35config GENERIC_PENDING_IRQ 36 bool 37 38# Support for generic irq migrating off cpu before the cpu is offline. 39config GENERIC_IRQ_MIGRATION 40 bool 41 42# Alpha specific irq affinity mechanism 43config AUTO_IRQ_AFFINITY 44 bool 45 46# Interrupt injection mechanism 47config GENERIC_IRQ_INJECTION 48 bool 49 50# Tasklet based software resend for pending interrupts on enable_irq() 51config HARDIRQS_SW_RESEND 52 bool 53 54# Preflow handler support for fasteoi (sparc64) 55config IRQ_PREFLOW_FASTEOI 56 bool 57 58# Edge style eoi based handler (cell) 59config IRQ_EDGE_EOI_HANDLER 60 bool 61 62# Generic configurable interrupt chip implementation 63config GENERIC_IRQ_CHIP 64 bool 65 select IRQ_DOMAIN 66 67# Generic irq_domain hw <--> linux irq number translation 68config IRQ_DOMAIN 69 bool 70 71# Support for simulated interrupts 72config IRQ_SIM 73 bool 74 select IRQ_WORK 75 select IRQ_DOMAIN 76 77# Support for hierarchical irq domains 78config IRQ_DOMAIN_HIERARCHY 79 bool 80 select IRQ_DOMAIN 81 82# Support for hierarchical fasteoi+edge and fasteoi+level handlers 83config IRQ_FASTEOI_HIERARCHY_HANDLERS 84 bool 85 86# Generic IRQ IPI support 87config GENERIC_IRQ_IPI 88 bool 89 90# Generic MSI interrupt support 91config GENERIC_MSI_IRQ 92 bool 93 94# Generic MSI hierarchical interrupt domain support 95config GENERIC_MSI_IRQ_DOMAIN 96 bool 97 select IRQ_DOMAIN_HIERARCHY 98 select GENERIC_MSI_IRQ 99 100config IRQ_MSI_IOMMU 101 bool 102 103config HANDLE_DOMAIN_IRQ 104 bool 105 106config IRQ_TIMINGS 107 bool 108 109config GENERIC_IRQ_MATRIX_ALLOCATOR 110 bool 111 112config GENERIC_IRQ_RESERVATION_MODE 113 bool 114 115# Support forced irq threading 116config IRQ_FORCED_THREADING 117 bool 118 119config SPARSE_IRQ 120 bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ 121 help 122 123 Sparse irq numbering is useful for distro kernels that want 124 to define a high CONFIG_NR_CPUS value but still want to have 125 low kernel memory footprint on smaller machines. 126 127 ( Sparse irqs can also be beneficial on NUMA boxes, as they spread 128 out the interrupt descriptors in a more NUMA-friendly way. ) 129 130 If you don't know what to do here, say N. 131 132config GENERIC_IRQ_DEBUGFS 133 bool "Expose irq internals in debugfs" 134 depends on DEBUG_FS 135 select GENERIC_IRQ_INJECTION 136 default n 137 help 138 139 Exposes internal state information through debugfs. Mostly for 140 developers and debugging of hard to diagnose interrupt problems. 141 142 If you don't know what to do here, say N. 143 144endmenu 145 146config GENERIC_IRQ_MULTI_HANDLER 147 bool 148 help 149 Allow to specify the low level IRQ handler at run time. 150